Switching amplifier with inductance means for transmitting energy

A method of obtaining an output signal from a direct current (DC) voltage, wherein the output signal is a linearly amplified replica of an input signal having first and second polarities, comprising the steps of:

• receiving the input signal;
• transforming the input signal for generating a discrete time peak current signal, wherein said transforming is according to that when applying the direct current (DC) voltage across an inductance means, the energy stored in the inductance means is proportional to square of the peak current of the inductance means;
• switching a current from the direct current (DC) voltage to the inductance means and getting a feedback current signal by detecting the current of the inductance means, wherein said switching is according to the discrete time peak current signal and the feedback current signal;
• blocking a current from the inductance means to a filter when the current from the direct current (DC) voltage to the inductance means is switched on, and conducting the current from the inductance means to the filter positively or negatively according to the polarity of the input signal when the current from the direct current (DC) voltage to the inductance means is switched off;
• filtering said current from the inductance means for outputting the output signal by the filter.

A switching amplifier for obtaining an output signal from a direct current (DC) voltage, wherein the output signal is a linearly amplified replica of an input signal having first and second polarities, said amplifier comprising:

• an inductance means;
• a switching unit comprising at least one switch and coupled to the inductance means for switching a current from the direct current (DC) voltage to the inductance means;
• a switching power transmitting unit comprising a plurality of switches and coupled to the inductance means for blocking a current from the inductance means to a filter when the current from the direct current (DC) voltage to the inductance means is switched on by the switching unit, and conducting the current from the inductance means to the filter unit positively or negatively according to the polarity of the input signal when the current from the direct current (DC) voltage to the inductance means is switched off by the switching unit;
• an amplifier control unit receiving the input signal and coupled to the switching unit and the switching power transmitting unit to control their switching according to the input signal;
• said filter unit to obtain an output signal corresponding to the input signal by filtering the current from the inductance means for outputting the output signal by the filter.